Switch-box.



A. G. CLARK. SWITCH BOX.

AAAAAAAAAAAAAAAAA PB. 18,1908. 907,740.

A. G. CLARK'.

SWITCH BOX.

APPLIGATION FILED APR.1a,19o.

Patented Dec. 29, 1908.

2 SHEETS-SHEET 2.

Il Il E f A WiTNESElE MQW'Qy" ATTY UNTTED STATES PATENT onirica ARBA G. CLARK, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY,

A CORPORATION OF NEW YORK.

SWITCH-B OX.

No. 907,740. Specification of Letters Patent. Patented Dec. 29, 1908. Application filed. April 18, 1908. Serial No. 427,943.

ToaZZ whom it may concern.' in which is journaled a shaft D. This shaft 5t Be it known that I, ABBA G. CLARK, a is provided with a crank E, which is concitizen of the United States, residing at nected to a rod F, which, in turn, is con- Schenectady, in the county of Schenectady, nected to the track-switch, so that when the State of New York, have invented certain track-switch is moved, the shaft Dis rocked.

new and useful Improvements in Switch- G is a second crank on the shaft D, the 60 Boxes, of which the following is a specificaend of which extends closeAto shaft H, which tion. llies parallel to shaft D, and is journaled in My invention relates to switch-boxes for suitable bearings l in the casing C.

use with track-switches, and its object is to J represents a pin rigidly secured to shaft rovide a novel form of switch-box, simpilL/H and passing through a hole in the block K, 65 1n construction and reliable in operation. which is pivoted on the end of crank G.

As'lis well understood in the art, it is cus- When the shaft D is rocked, its movement to'mary, in connection with block-signal sysis transmitted to shaft H by the hlock'K tems, to employ switch-boxes, connected to rocking and sliding on the in J. The pin J the track-switches, comprising electric conthus forms a link, thee ective lengt of 70 tacts arranged to control the signals or which varies in different positions of crank switch indicators when the track-switch is G. The shaft H carries a number of in.- thrown. It is ordinarily desirable that the sulated contacts L, which are adapted to electric switch-contacts should be actuated engage stationary contacts M, which are upon the movement of the track-switch carried by and insulated from a bracket N 75 through a small part of this range, and for secured to the casing C. this reason the actuating member for the The operation of the switch box will be switch-contacts should be given a considerobvious from the above description. The able movement by a small movement of the parts normally stand in the position shown track-switch. in Fig. 4. If the track-switch is moved very S0 My invention comprises, in a switch-box, slightly in such a direction as to cause crank a member connected to and moving with the G to move downward, pin J, and consetrack-switch, a shaft, switch-contacts actuquently, contacts L are caused to assume the ated thereby, and a link of variable effective positions shown in Fig. 5. It will be seen .length connecting said member and said that in Fig. 4 the pin J forms a very short 85 shaft, the effective length of the link being link between the crank Gr` and shaft H, and small when the member is moving at right that the movement of the block K, which angles to the axis of the link, whereby, as forms the connection between crank G and will hereinafter be explained, a slight movepin J, is at right-angles to the axis of ypin J,

ment of the member produces a great anguso that a very slight movement vof crank G 90 lar movement of the shaft. produces a great angular movement of shaft My invention will best be understood by H, thereby givin a rapid and wide break reference to the ,accompanying drawings, in between contacts and contacts M.v A furwhich ther movement of the track-switch and a Figure 1 shows a track-switch provided consequent further downward movement of 95 with a switch-box; Fig. 2 shows. a pers eccontact J produces only a slight movement tive view, with the casing partly bro en of pin J, the extreme position of this pin be- Vaway,"'c` f a switch-box arranged in according shown in dotted lines in Fig. 5. In this 45 ance with my invention; Fig. 3 is a detail position of the pin a slight movement of view; Flg. 4 shows a cross-sectional side crank Gr produces practically no movement 10o elevation of the switch-box, with theparts of the pin, butmerely slides the block K shown in normal position; and Fig. 5 is a along thepin.

similar viewwth the parts in the position By properlyshaping the crank E and the 5o they occupy when the track-switch has been contacts L, as shown in the drawings, the

sli htly moved. switch box is made reversible,-that 1s may 105 n the drawings, A represents the track be adapted-for either rigiht-hand or left-hand switch, and B its actuating-rod. connection to the trac switch. TA ortion C represents the casing of the switchjbox, of the bottom of the casing is pre erably.

raised, as shown in the drawings, in order that the leads to the stationary contacts M may conveniently 'be led under the-box. v

What I claim as new and desire to secure by Letters Patent of the United States, is

1. A switch-box for use with trackswitches, comprising a member connected to contacts carried on and'insulated from said shaft, stationary contacts adapt-ed to be engaged thereby, and a link of variable effective length connecting said member and said shaft, the effective length 'of said link being small when said member is moving at rightangles to the axis of the link, whereby a slight movement of said member roduces a great' angular movement of said s aft.

3.v A switch `box for use .with trackswitches, comprising a member connected to and moving with the track-switch, a shaft, switch-contacts actuated thereby, and a link connecting said member and said shaft and having a sliding engagement with one of them, whereby the effective length of said. link varies in different positions of said member, and the point of connection between said member and said link being close` to the axis of said shaft in one position of said member, whereby a slight movement of said member from said position produces a great angular movement of said shaft.

, 4. A switch-box for use with trackswitches, comprising a member connected to and ino ing with the track-switch, a shaft, contacts carried on and insulated from said shaft, stationary contacts adapted to be engaged thereby, and a link connecting said y member and `said shaft and ha ing a sliding engagement with one of them, whereby the effecti e len-gthof said link #aries in ditierent positions ofsaid member, and the point of connection between said member and said link being close to the axis of said shaft in one positioni of said member, whereby a slight movement of said member from said posi- ,tion produces a great angular movement of said shaft.

5. A switch-box for use with trackswitches, a casing, two parallel shafts journaled in saidcasing, a crank on one shaft con^ nected to the track-switch, a second crank on said shaft extending close to said seemid shaft, a link of variable elfecti' Ae length connecting said second crank and said second shaft, and switch-contacts,actuated by said second shaft.

' 6. A switch box for use with trackswitchea'a casing, two parallel shafts journaled in said casing, a crankon one shaft connected to the track-switch, a second crank on said shaft extending close to' said second shaft, a link of variable effecti e length connecting said second crank' and said second shaft, contacts carried on and insulated from said second shaft, and stationarycontacts adapted to be engaged thereby.

7. A switch -bbox for use with trackswitches, a casing, two parallel shafts' journaled in said casing, a crankon one shaft connected to the track-switch, a second crank on said shaft extending close to said second shaft, a link connecting said second crank 'and said second shaft and hazing a sliding connection with one of them, whereby the effecti e length of said link :aries in difi erent positions of said second crank, and switchcontacts actuated by said second shaft.

8. A switch box for use with trackswitches, a easing, two rparallel shafts journ ABBA e. enten.

Witnesses:

BENJAMIN B. HULL, HELEN Onroiin. 

